If you are adopted, as @jca points out, and also if you are born from a surrogate in some states she is on the first birth certificate andbthen it is changed to the parents. In other states the parents go immediately on the birth certificate.
I would assume if there is no father of record and late the father is found his name can be added? I’m not sure how that works.
I was teasing Italian Princess on facebook, because she’s finding out what a hassle it is to change her name. She said she went to the DMV and they told her she had to change her SS first. I said, “And THEY’LL tell you have to change your birth certificate!”
She thought I was serious! :D Thus, this question.